Display System Log Files

To display a log file stored on a single-chassis system, enter Junos OS CLI operational mode and issue either of the following commands:

By default, the commands display the file stored on the local Routing Engine. To display the file stored on a particular Routing Engine, prefix the file or pathname with the string re0 or re1 and a colon. The following examples both display the /var/log/messages file stored on the Routing Engine in slot 1:

For information about the fields in a log message, see Interpreting Messages Generated in Standard Format by a Junos OS Process or Library, Interpreting Messages Generated in Standard Format by Services on a PIC, and Interpreting Messages Generated in Structured-Data Format. For examples, see Log File Sample Content.

This topic contains sample content from the /var/log directory. You can display the contents of the /var/log/messages file stored on the local Routing Engine. (The /var/log directory is the default location for log files, so you do not need to include it in the filename. The messages file is a commonly configured destination for system log messages.)

You can display the contents of the file /var/log/processes, which has been previously configured to include messages from the daemon facility. When issuing the file show command, you must specify the full pathname of the file:

You can display the contents of the file /var/log/processes when the explicit-priority statement is included at the [edit system syslog file processes] hierarchy level:

Warning Message Support for Throughput Overuse:

The device supports up to 20 Gbps and 7 Mpps of Internet mix (IMIX) firewall performance. When IMIX throughput exceeds these limits, new log messages are generated. These log messages serve as reminders that throughput overuse is occurring. You can see the following sample log messages when you issue the show log messages command.

As a reminder of throughput overuse, every 15 minutes the system calculates how many minutes the throughout has exceeded 20 Gbps and 7 Mpps. The system triggers a log message if the throughput has exceeded more than 1 minute, 30 seconds (10%) of the last 15 minutes. For example, suppose you see the following log message:

It means your throughput has exceeded 20 Gbps and 7 Mpps for 5 minutes, 15 seconds of the last 15 minutes (35% of 15 minutes) that triggered the log message.

To turn off this log message, we recommend that you bring down the throughput level below 20 Gbps and 7 Mpps or install the enhanced performance upgrade license.